The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1887-06-18
SCIENCE AND INDUSTRY.

The grape industry is taking fresh
hold in the southern part Of New Jer-
sey.
"A new wire-nail making machine
Is capable Of turning out $4,000 wire
nails per hour.
Inequality in the pupils Of The eyes
has been taken rs a symptom OF illness,
but in 1874 healthy persons Russian
physician has found only twelve with
right and left pupils of equal size.-
Merchant Traveller.
"A telegraph wire is now being
brought out in England in which the
steel is made to cover and surround the
copper. The wire is said to be drawn
from compound metal, consisting of q
hollow ingot of steel filed with copper.
The average weight of the hogs
slaughtered in the West during the
winter is 7.67 pounds lighter than
year ago. The aggregate production is
equal to 50,597 less than last year at
the same average weights. Christian
at Work.
Japan grows enormous quantities
OF sorghum cane, and large quantities
of granulated sugar have been made
from it.. The product for one year was
estimated at 12,0O0.000 pounds. The
principal crop of this country is rice;
one-half the entire land under cultiva-
ton, it is said, being devoted to its
growth.
"A Partisan electrician has devised
a mode of utilizing the residual liquids
from bichromate and other powerful
batteries. He mixes porous acid-proof
substance with the residual liquids, dries
the paste thus produced, and uses it is
a charge for batteries for telegraphic
purposes. Popular Science Monthly.
Recent delicate scientific expert
ments, says n writer on earthquakes.
have discovered the fact that the sur
face of the land is never absolutely ut
rest for more than thirty hours at time.
Thus those great earthquakes which
make epochs in history are merely ex-
treme manifestations of forces that
rarely sleep.
While cleanliness is of vast i'm
portance rs preventive of disease,
there is tendency on the part of sani-
itarians to assume that nothing else is
necessary. The Lancet declares that
every year teaches that many maladies.
especially some of those which are
communicable, have less to do with
filth as n cause than was formerly sup
posed. Sanitary science, in order to
be progressive, must insist upon more
than mere cleanliness, important as
that is.
The Sheffield armor plate makers
are actively engaged in meeting the
new conditions imposed by the in
creased power of projectiles. One firm
has produced an experimental plate
which has stubbornly resisted the
French shells; and another expert.
mental plate was fired at recently by u
French projectile, with the result that
the projectile was broken by the blow
and failed to penetrate the plate
Boston Budget.
The microphone is now being used
in Germany for the purpose of detect
ing loss of water through leakage in
town mains. The apparatus consists
of steel rod, which is placed upon the
cock in the ncighborhood of which the
, leak is suspected, and microphone
attached to the upper end of the rod.
A dry battery and telephone completes
{ the equipment. No sound is heard in
the telephone if the cocks are closed
and no leak occurs; but leak even of
. a few drops through badly-titting
cock causes sufficient vibration in the
pipe to affect the microphone. and give
audible sounds in the telephone.
trical ReUieW.